A number in the form:
1.234
is often loosely called decimal, though the name really refers to the fact that its base is 10, and has nothing to do with the faction part.
A binary number in the form:
1.0101
follows the same principal, but, obviously it can’t be called a decimal. The same would apply to numbers of any other base.
Is there a proper generic name for fractions expressed using this notation?
$1.234$ is a decimal fraction, in the sense that it's $\dfrac{1234}{10^3}$.
So, $1.0101_2$ is a binary fraction, in the sense that it's $\dfrac{10101_2}{2^4}$.